Powder Mesh Sizes

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Mesh

Sieve Designation

Microns (μm)

mm

inches

Examples

1 in.

25.4 mm

25400

25.400

1.0000

7/8 in.

22.6 mm

22600

22.600

0.8750

3/4 in.

19.0 mm

19000

19.000

0.7500

5/8 in.

16.0 mm

16000

16.000

0.6250

0.530 in.

13.5 mm

13500

13.500

0.5300

1/2 in.

12.7 mm

12700

12.700

0.5000

7/16 in.

11.2 mm

11200

11.200

0.4380

3/8 in.

9.51 mm

9510

9.510

0.3750

5/16 in.

8.00 mm

8000

8.000

0.3120

0.265 in.

6.73 mm

6730

6.730

0.2650

1/4 in.

6.35 mm

6350

6.350

0.2500

No.3 1/2

5.66 mm

5660

5.660

0.2230

No. 4

4.76 mm

4760

4.760

0.1870

No. 5

4.00 mm

4000

4.000

0.1570

No. 6

3.36 mm

3360

3.360

0.1320

No. 7

2.83 mm

2830

2.830

0.1110

No. 8

2.38 mm

2380

2.380

0.0937

No. 10

2.00 mm

2000

2.000

0.0787

No. 12

1.68 mm

1680

1.680

0.0661

No. 14

1.41 mm

1410

1.410

0.0555

No. 16

1.19 mm

1190

1.190

0.0469

No. 18

1.00 mm

1000

1.000

0.0394

No. 20

841μm

841

0.841

0.0331

No. 25

707μm

707

0.707

0.0278

No. 30

595μm

595

0.595

0.0234

~ Granulated Sugar

No. 35

500μm

500

0.500

0.0197

No. 40

420μm

420

0.420

0.0165

No. 45

354μm

354

0.354

0.0139

No. 50

297μm

297

0.297

0.0117

~ Caster Sugar

No. 60

250μm

250

0.250

0.0098

No. 70

210μm

210

0.210

0.0083

No. 80

177μm

177

0.177

0.0070

No. 100

149μm

149

0.149

0.0059

No. 120

125μm

125

0.125

0.0049

No. 140

105μm

105

0.105

0.0041

No. 170

88μm

88

0.088

0.0035

No. 200

74μm

74

0.074

0.0029

200 Mesh and finer is normally considered Micronised

No. 230

63μm

63

0.063

0.0025

~ Icing Sugar

No. 270

53μm

53

0.053

0.0021

No. 325

44μm

44

0.044

0.0017

No. 400

37μm

37

0.037

0.0015

Larger sieve openings (1 in. to 1/4 in.) have been designated by a sieve "mesh" size that corresponds to the size of the opening in inches. Smaller sieve "mesh" sizes of 3 1/2 to 400 are designated by the number of openings per linear inch in the sieve.The following convention is used to characterize particle size by mesh designation:a "+" before the sieve mesh indicates the particles are retained by the sieve;a "-" before the sieve mesh indicates the particles pass through the sieve;typically 90% or more of the particles will lie within the indicated range.

For example, if the particle size of a material is described as -4 +40 mesh, then 90% or more of the material will pass through a 4-mesh sieve (particles smaller than 4.76 mm) and be retained by a 40-mesh sieve (particles larger than 0.420 mm).

If a material is described as -40 mesh, then 90% or more of the material will pass through a 40-mesh sieve (particles smaller than 0.420 mm).